Bio:Father of Marvel Boy (01 - Robert Grayson). Dr. Grayson was a German scientist that built a rocket to take himself and his infant son, Robert, into space at the beginning of World War II in order to spare his son the horrors of war. Dr. Grayson and Robert eventually settled on Uranus with an offshoot of the Eternals race. While Marvel Boy was on Earth, Dr. Grayson died with the rest of the Uranian Eternals.